How much of a 15% acid solution must be mixed with a solution containing 35% solution should result in 20 gallons of a 20% solution?

Consider a three-dimensional grid whose dimensions are 10 by 15 by 20. you are at the front lower left corner of the grid and wish to get to the back upper right corner 45 "blocks" away.

Evaluate - 5-15+4+15

A teacher would like to estimate the percentage of her students who play chess. Which method should the teacher use to select the sample?

Solve 2x2 + 5x = 12 a) x = 3/2 and x = - 4 b) x = 2 and x = - 3 c) x=-6 and x = 5 d) x = 1/2 and x = 1/3

As mars revolves around the sun, it travels at a rate of 15 miles per second. covert this rate to miles per minute, at this rate, how many miles will mars travel in 5 minutes. do not round answer

Write the equation in slope-intercept form. What are the slope and y-intercept? - 12x-4y=10

Twice a number decreased by 72 is five times the sum of the number and three times the number

The measure of the angles of a triangle are given as 2x°, 3x°, and 4x°. What are the measures of each angle?

Ethan decided to type up some documents while waiting for the meeting to start. he can type 2 pages every 1/8 hours. if the meeting started 3/4 hour later than the scheduled time, how many pages can he type before the meeting starts

A man hiked a distance of 9 miles into the country. he rode back in a car along the same route at the rate of 27 mph. if the entire trip took 3 hours and 20 min, find his rate while walking. answer: mph